Improvement in steam-generators



UNITED STATES PATENT OFFICE.

AND WM. G. PENNYPAOKER, OF SAME PLACE.

IMPROVEMENT IN STEAM-GENERATORS.

Specification forming part of Letters Patent No. 51,510, dated December l2, 1865.

To all whom it may concern:

Be it known that I, JAMES OONNERY, of Wilmington, in the county of New Castle and State of Delaware, have invented a new and Improved Steam-Boiler; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, formingpart of this specification, in which- Figure 1 represents a vert-ical central section of this invention. Fig. 2 is a horizontal section ot' the same, taken in the plane indicated by the line x x, Fig. 1.

Similar letters of reference indicate like parts.

This invention relates to a steam-generator the tire-box of which is surrounded by a waterjacket extending all round. Suspended from the crown-sheet of the iirebox is a cylinder, which communicates with the water-space of the boiler'. The outside diameter of this cylinder is much smaller than the inside diameter of the tire-box, and the annular space thus formed in the tire-box is occupied by a series of pipes emanating from the lower part of said cylinder, and terminating` in its upper part in such a manner that a very large heating-surface is obtained andthe water is caused to circulate freely throughout the boiler. From the crown-sheet of the fire-box rise a series of tubes through the upper part ofthe water-space and through the steam-space of the boiler, and by these means the heating-surface of the boiler is still further increased and the steam in the boiler is dried and partially superheated.

A represents the cylindrical shell ot' the boiler, which surrounds the tire-box B, leaving a narrow annular space, O, all round said rebox, as shown in Fig. 2 of the drawings. The interior of the tire-box is occupied by a cylinder, D, which is suspended from the crownsheet a, and by a series of curved pipes, E, which emanate from the cylinder close down to its bottom and terminate near its top, as shown in Fig. l. If desired, these pipes may commence and terminate at different levels, so as to effect a still further increase in the circlilation of the water in the boiler.

The cylinder D is open on top, and from its lower part extend four (more or less) pipes, b, to the annular space O, and a communication is thus effected between the Water-space ofthe boiler and the interior of the cylinder at the top a-nd bottom thereof. By this arrangement the water is allowed to circulate freely through out the whole boiler, and, furthermore, by the use of the cylinder D and pipes E, the heatin g-surface of the boiler is materiallyincreased and steam is generated with great economy or fuel. Any sediment formed in the interior or the cylinder D can be readily cleaned out, ac cess being had to it through a man-hole, d, in the' top plate of the boiler.

The heated gases and products of combustion, rising from the fire in the fire-box, pass up through a series of tubes, c, which are secured at their bottom ends in the crown-sheet a and at their upper ends in the top plate ot' the boiler. These tubes, passing through the upper part of the Water-space, increase the heating-surface ofthe boiler, and, furthermore, by their action the steam in the steam-space ot' the boiler is dried and partially superheated.

What I claim as new, and desire to secure by Letters Patent, is-

The cylinder D, with vertical pipes E and radiating-pipes l), in combination with the tirebox B, shell A, annular water-space O, and heating-tubes e, constructed and operatin g substantiall y as and for the purpose described.

JAMES GONNERY.

Witnesses:

WM. G. PENNYPAGKER, CEAS. S. ROBE. 

